The nation’s highest civilian honor is “a tribute to the idea that all of us, no matter where we come from, have the opportunity to change this country for the better,” President Barack Obama said in an announcement Wednesday.

“From scientists, philanthropists and public servants to activists, athletes and artists, these 21 individuals have helped push America forward, inspiring millions of people around the world along the way,” Obama said.

The current version of the award was established by former president John F. Kennedy more than 50 years ago to honor those who have made outstanding contributions to the security or national interests of the United States, to world peace, or to other significant public or private endeavors.